12 Raspberry Crumble Bars for Perfect Year-Round Baking

Raspberry Crumble Bars

If you have fresh raspberries and twenty minutes of prep time, you are already halfway to a warm, buttery dessert that works for any occasion. I love how these raspberry crumble bars come together without any fussy steps.

The crust and the crumble topping start from the same simple dough, so you are not making two separate components. The filling stirs together quickly in one bowl, no special equipment needed.

These bars pair a buttery shortbread base with a sweet and tart berry filling. They fit right in at a summer picnic, and they look just as good on a holiday cookie tray.

I often bring them to potlucks and bake sales because they travel well and slice neatly. They also make a thoughtful gift stacked in a small box with parchment between the layers.

One of my favorite ways to serve them is warm from the pan with a scoop of vanilla ice cream. The contrast of the cold creamy ice cream against the warm berry filling is one of those treats that works every time.

If you have frozen raspberries on hand, you can use those too. You can even use a good raspberry jam when fresh berries are out of season.

With about 20 minutes of prep and a short bake, these bars are approachable for a weeknight or a weekend baking project. I have made them in the middle of summer when berries are plentiful, and I have made them in December when I want a bright, fruity note on a cookie platter. They really do work year round.

Why you’ll love this recipe

Here is what makes these raspberry crumble bars a recipe I come back to again and again.

• Buttery shortbread meets sweet and tart raspberry. The base is rich and tender, while the filling brings a bright, fruity contrast.
• One dough does double duty. The same mixture becomes both the crust and the crumble topping, which keeps the process simple.
• Flexible filling options. You can use fresh raspberries, frozen raspberries that have been thawed and drained, or even raspberry jam.
• An all season treat. These bars are at home on a summer picnic table and on a holiday dessert tray.

I also appreciate that they do not require a mixer or any fancy equipment. A bowl, a pastry cutter or two forks, and a baking pan are all you need.

Ingredients for Raspberry Crumble Bars

Before you start, measure your flour by spooning it into the measuring cup and leveling it off with a knife. If you scoop directly from the bag, you can pack in too much flour and end up with a dry, crumbly crust. That small step makes a real difference.

For the dough:

• 3 cups all purpose flour
• 1/2 cup packed light brown sugar
• 1/2 cup granulated sugar
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 1 cup cold unsalted butter, cubed
• 1 large egg, at room temperature

For the filling:

• 2.5 cups fresh raspberries
• 1/2 cup granulated sugar
• 2 tablespoons lemon juice
• 1 tablespoon cornstarch
• 1 teaspoon vanilla extract

Keep the butter in the refrigerator until just before you need it. Cold butter is what gives the shortbread its flaky texture. If you only have salted butter, you can use it and simply omit the added salt in the dough.

The egg should be at room temperature so it blends into the dough more easily. If you forgot to take it out ahead of time, place it in a bowl of warm water for a few minutes.

For the filling, fresh raspberries are ideal. If you use frozen raspberries, thaw them completely in a colander so the excess liquid can drain away. Then pat them dry with paper towels. Skipping this step can make the filling too wet and the bars soggy.

Cornstarch is the thickener here. It helps the raspberry filling set so the bars hold their shape when you slice them. Lemon juice and vanilla add brightness and depth to the berries. I love how those two small additions make the raspberry flavor pop.

How to Make Raspberry Shortbread Bars

This method is straightforward, and the payoff is a pan of golden bars with a jammy center.

1. Preheat your oven to 375°F. Line a 9×13 inch baking pan with parchment paper, leaving some overhang on the sides for easy removal. Lightly spray the parchment with nonstick cooking spray.
2. In a large bowl, whisk together the flour, brown sugar, granulated sugar, baking powder, and salt.
3. Cut in the cold cubed butter using a pastry cutter until the mixture looks like pea sized crumbs. You can also use two forks or pulse everything in a food processor. The key is to keep the butter cold and stop when you have coarse crumbs.
4. Work in the egg until the dough comes together. It may look crumbly at first, but it will hold when you press it.
5. Press about two thirds of the dough into the bottom of the prepared pan in an even layer. Bake for 10 minutes.
6. While the crust bakes, make the filling. In a separate bowl, combine the raspberries, granulated sugar, lemon juice, vanilla extract, and cornstarch. Lightly mash the berries with a fork. You want some texture, not a smooth puree.
7. Spread the raspberry mixture evenly over the partially baked crust. Crumble the remaining dough over the top.
8. Return the pan to the oven and bake for another 30 to 35 minutes, until the edges are lightly golden.
9. Let the bars cool completely in the pan before slicing. This is important for clean cuts. If you slice them warm, the filling will run.

Once cooled, lift the bars out using the parchment overhang and cut them into 12 squares. I find a sharp knife works best, and wiping the blade between cuts helps keep the edges neat.

Storage

These bars store well, which makes them a great make ahead dessert. Here is how I keep them fresh.

I usually keep a few in the refrigerator during the summer because our kitchen gets warm. They taste just as good cold as they do at room temperature. If you want to warm one up, a quick 20 seconds in the microwave does the trick. The filling gets soft and the crumble topping warms through.

For longer storage, freezing is the way to go. Just be sure the bars are completely cool before wrapping them. Any warmth trapped inside will create ice crystals. When you are ready to eat, leave them on the counter for about 30 minutes. They thaw quickly and the texture stays lovely.

Recipe Tips

These tips will help you get the best results every time.

• Use cold butter. Cold butter is essential for that tender, flaky shortbread texture. If the butter warms up, pop the dough in the fridge for a few minutes before baking.
• Do not overbake. The edges should be golden brown, not dark. Overbaking dries out the bars and can make the filling tough.
• Line the pan with parchment. This makes removal easy and helps you lift the whole slab out for clean slicing.
• Cool completely before slicing. This is the step that gives you neat squares instead of a crumbled mess.
• Serve with vanilla ice cream. A scoop on top turns these bars into a special dessert. The warm berries and cold ice cream are a wonderful combination.

I also like to add a pinch of flaky sea salt on top of the crumble before baking. That little salty bite balances the sweetness. It is optional, but it is one of my favorite small upgrades.

Additions and variations

Once you have the basic recipe down, you can play with it in several ways.

• Try different fruits. Blueberries, blackberries, or strawberries all work well. You can use a single fruit or a mix.
• Use jam. Seedless raspberry jam or preserves can stand in for fresh berries. If you like, add a little lemon zest to the jam for extra brightness.
• Add cinnamon. Stir 1 to 2 teaspoons of cinnamon into the crumble mixture for a warm, cozy flavor.
• Swap the extract. Almond extract can replace the vanilla. Use the same amount for a different flavor profile.
• Make a smaller batch. Halve the recipe and bake it in an 8 inch or 9 inch square pan. You will need to adjust the baking time slightly, so start checking a few minutes early.

I love making the blueberry version in July when local berries are everywhere. The blackberry version feels a little more elegant, and it is lovely with a cup of tea. The strawberry version tastes like summer. No matter which fruit you choose, the method stays the same.

If you are a fan of almond, the almond extract variation is really nice with raspberries. It adds a subtle nutty note that complements the tart berries. And if you are baking for a smaller household, the half batch is a smart way to enjoy these bars without a lot of leftovers. They freeze well either way.